Oh that one! It’s more asking how Marik kept a secret hold over tea that he could come back to. Which i believe it was because he left something behind the first time, a back door. The funny thing is I bet Kaiba would understand it better it being his true item
I was reading up on marik and it doesn't explain how he used Tea to talk to them. He just did when his darker half wasn't paying attention. I gotta look up the rods abilities again.
Okay. So I looked it up. The rod has a telekinesis ability that let's them listen in on people and even speak through them. Marik left a piece of him to speak to ishizu and the group.
And if you need a break from One Piece, Hazbin is only a few episodes. I haven’t started it over yet, one piece is on my watch list. But I figured I should get the one season ones out of the way first